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Synonyms

laughing gas

American  

laughing gas British  

noun

  1. another name for nitrous oxide

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

laughing gas Scientific  
/ lăfĭng /
  1. Nitrous oxide used as a mild anesthetic.


Etymology

Origin of laughing gas

First recorded in 1835–45

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

During the removal process, she wore a face mask connected to a rolling cart of the laughing gas and oxygen tanks.

From The Wall Street Journal • Mar. 1, 2026

Nitrous oxide – known colloquially as "laughing gas" – has many uses, from a painkiller during dental procedures to a whipping agent for canned whipped cream.

From BBC • May 27, 2025

"Engine tests have shown varying degrees of emissions of laughing gas, which is a very potent greenhouse gas with more than 200 times the global warming impact than carbon dioxide."

From Science Daily • Feb. 5, 2024

It’s a little like “Mad Max” on laughing gas.

From New York Times • Jul. 20, 2023

Her bones felt warm and flexible; her joints were held together with laughing gas.

From "When Dimple Met Rishi" by Sandhya Menon